A278256 Least number with the same prime signature as the n-th oblong number (A002378).

2, 6, 12, 12, 30, 30, 24, 72, 60, 30, 60, 60, 30, 210, 240, 48, 60, 60, 60, 420, 210, 30, 120, 360, 60, 120, 360, 60, 210, 210, 96, 480, 210, 210, 1260, 180, 30, 210, 840, 120, 210, 210, 60, 1260, 420, 30, 240, 720, 180, 420, 420, 60, 120, 840, 840, 840, 210, 30, 420, 420, 30, 420, 2880, 960, 2310, 210, 60, 420, 2310, 210, 360, 360, 30, 420, 1260, 420, 2310

Offset: 1

Author

Antti Karttunen, Nov 22 2016

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000

Crossrefs

Odd bisection of A278259.

Cf. A002378, A046523.

Cf. also A278253.

Programs

Scheme

(define (A278256 n) (A046523 (A002378 n)))

Formula

a(n) = A046523(A002378(n)).

a(n) = A278259((2*n) + 1).