A218601 After the first zero, integers from 0 to A213709(n)-1 followed by integers from 0 to A213709(n+1)-1, etc.

0, 0, 0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 0

Offset: 0

Author

Antti Karttunen, Nov 10 2012

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 0..8727

Crossrefs

Needed for A218602. Cf. also A218599, A053645, A082853, A002262.

Programs

Scheme

(define (A218601 n) (if (zero? n) n (-1+ (- n (A218600 (-1+ (A213711 n)))))))

Formula

a(0)=0, and for n>0, a(n) = (n-A218600(A213711(n)-1))-1.