The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A215501 Inverse of permutation in A215366. 3
 1, 2, 3, 4, 5, 6, 8, 7, 9, 10, 13, 11, 20, 14, 15, 12, 31, 16, 46, 17, 21, 22, 68, 18, 23, 32, 24, 25, 98, 26, 140, 19, 33, 47, 34, 27, 196, 69, 48, 28, 273, 35, 374, 36, 37, 99, 509, 29, 49, 38, 70, 50, 685, 39, 51, 40, 100, 141, 916, 41, 1213, 197, 52, 30 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Permutation of the natural numbers A000027 with fixed points 1-6, 9, 10, 14, 15, 21, 22, 33, 49, 1095199, ... and inverse permutation A215366 (with offset 1). LINKS Alois P. Heinz, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A000070(A056239(n)-1)+1 for n in A000040. a(n) = A000070(A056239(n)) for n in A000079. A000070(A056239(n)-1) < a(n) <= A000070(A056239(n)). MAPLE g:= proc(n, i) option remember; `if`(n=0 or i<2, [2^n], [seq(       map(p->p*ithprime(i)^j, g(n-i*j, i-1))[], j=0..n/i)]) end: b:= proc() local l, i; l:=[]; i:=0;       proc(n) while nops(l)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 21 19:12 EDT 2021. Contains 345365 sequences. (Running on oeis4.)