300 (number) and strictly non-palindromic number. 361 = 19, centered triangular number, centered octagonal number, centered decagonal number, member of the Mian–Chowla sequence; also the number of positions on a standard 19 x 19 Go board. The Bahá'í calendar is based on 19 months of 19 days each. 362 = 2 × 181, Mertens function returns 0, nontotient, noncototient. 363 = 3 × 11, sum of nine consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59), Mertens function returns 0, perfect totient number. 364 = 2 × 7 × 13, tetrahedral number,
Handley Page Dart Herald designated the HPR.7 Dart Herald, was powered by 1,910 shp Dart 527 engines driving 12 ft 6 in (3.81 m) variable pitch four-blade Dowty Rotol propellers, and the fuselage was lengthened by 20 in (51 cm), while other improvements included increased fuel capacity. The first prototype was converted to Dart Herald standard, making its maiden flight on 11 March 1958, with the first production aircraft flying on 30 October 1959. The initial Series 100 version of the Dart Herald was certified in April 1958. The basic price in 1960 was around £185,000. The first order for the Dart Herald was