A276604 After a(0)=0, the first differences of A276623.

0, 2, 2, 4, 2, 2, 4, 4, 6, 2, 2, 4, 4, 4, 4, 6, 4, 6, 6, 4, 8, 2, 2, 4, 4, 4, 4, 6, 4, 6, 6, 4, 8, 6, 4, 8, 8, 4, 6, 6, 4, 8, 6, 4, 6, 8, 4, 8, 8, 10, 2, 2, 4, 4, 4, 4, 6, 4, 6, 6, 4, 8, 6, 4, 8, 8, 4, 6, 6, 4, 8, 6, 4, 6, 8, 4, 8, 8, 10, 6, 4, 6, 8, 4, 8, 8, 10, 8, 8, 10, 4, 6, 6, 4, 8, 6, 4, 6, 8, 4, 8, 8, 10, 6, 4, 6, 8, 4, 8, 8, 8, 8, 8, 10

Offset

0,2

Links

Antti Karttunen, Table of n, a(n) for n = 0..6250

Formula

a(n) = A053735(A276623(n)).

a(0) = 0; for n >= 1, a(n) = A276623(n) - A276623(n-1).

Prog

(Scheme, two alternatives)
(define (A276604 n) (A053735 (A276623 n)))
(define (A276604 n) (if (zero? n) n (- (A276623 n) (A276623 (- n 1)))))

Crossrefs

Cf. A053735, A276623, A276605 (terms divided by 2).

Sequence in context: A242734 A309709 A143230 * A072301 A127171 A215655

Adjacent sequences: A276601 A276602 A276603 * A276605 A276606 A276607

Keyword

nonn,base

Author

Antti Karttunen, Sep 11 2016

Status

approved