A255055 Greatest inverse of A255072; a(n) = largest k such that A255072(k) = n.

0, 2, 5, 6, 10, 13, 14, 18, 22, 26, 29, 30, 34, 38, 43, 46, 50, 54, 58, 61, 62, 66, 70, 75, 78, 85, 90, 94, 98, 102, 107, 110, 114, 118, 122, 125, 126, 130, 134, 139, 142, 149, 154, 158, 165, 171, 175, 181, 186, 190, 194, 198, 203, 206, 213, 218, 222, 226, 230, 235, 238, 242, 246, 250, 253, 254, 258

Offset

0,2

Links

Antti Karttunen, Table of n, a(n) for n = 0..16143

Formula

a(0) = 0; for n > 0, a(n) = A255054(n) + a(n-1).

Other identities. For all n >= 0:

a(n) = A255053(n) + A255054(n) - 1.

a(n) = A255056(n) + A255124(n).

Prog

(Scheme, with Antti Karttunen's IntSeq-library, three different implementations):
(definec (A255055 n) (if (zero? n) n (+ (A255054 n) (A255055 (- n 1)))))
(define A255055 (COMPOSE -1+ (LEAST-I-WITH-FUN-I-EQ-N 0 0 A255072) 1+)) ;; Slow !
(define (A255055 n) (+ (A255053 n) (A255054 n) -1))

Crossrefs

Cf. A255053, A255054, A255072.

Analogous sequences: A173601, A219645, A219655.

Sequence in context: A255341 A089269 A047440 * A344314 A369020 A358817

Adjacent sequences: A255052 A255053 A255054 * A255056 A255057 A255058

Keyword

nonn

Author

Antti Karttunen, Feb 14 2015

Status

approved