A227742 Fixed points of permutation A227741.

1, 4, 8, 12, 16, 23, 28, 32, 36, 43, 51, 59, 64, 71, 76, 80, 84, 91, 99, 107, 115, 126, 135, 143, 148, 155, 163, 171, 176, 183, 188, 192, 196, 203, 211, 219, 227, 238, 247, 255, 263, 274, 286, 298, 307, 318, 327, 335, 340, 347, 355, 363, 371, 382, 391, 399, 404

Offset: 1

Author

Antti Karttunen, Jul 25 2013

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..1000

Programs

Scheme

(define (A227742 n) (+ (A173318 (* 2 (- n 1))) (/ (+ 1 (A005811 (- (* 2 n) 1))) 2)))

Formula

a(n) = A173318(2*(n-1)) + (1/2)*(1 + A005811((2n)-1)).