A275721 Numbers n for which A003961(n+1) > A003961(n).

1, 2, 3, 5, 7, 11, 13, 14, 15, 17, 19, 23, 25, 26, 29, 31, 34, 35, 37, 38, 39, 41, 43, 44, 47, 49, 51, 53, 55, 59, 61, 62, 63, 65, 67, 69, 71, 73, 74, 77, 79, 80, 83, 85, 86, 87, 89, 91, 94, 95, 97, 99, 101, 103, 107, 109, 111, 113, 115, 116, 118, 119, 121, 122, 123, 124, 125, 127, 129, 131, 134, 137, 139, 142, 143, 145

Offset

1,2

Comments

Positions of the ascents in permutation A048673.

Links

Antti Karttunen, Table of n, a(n) for n = 1..16384

Mathematica

f[n_] := Times @@ Map[Prime[PrimePi@ First[#] + 1]^Last[#] &, FactorInteger@ n]; Select[Range@ 145, f@ # < f[# + 1] &] (* Michael De Vlieger, Aug 07 2016 *)

Prog

(Scheme, with Antti Karttunen's IntSeq-library)
(define A275721 (MATCHING-POS 1 1 (lambda (n) (> (A003961 (+ 1 n)) (A003961 n)))))

Crossrefs

One less than A275717.

Complement: A275722.

Cf. A003961, A048673, A275719.

Sequence in context: A034442 A077620 A370123 * A007933 A032524 A097312

Adjacent sequences: A275718 A275719 A275720 * A275722 A275723 A275724

Keyword

nonn

Author

Antti Karttunen, Aug 07 2016

Status

approved