A218784 - OEIS

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A218784

Positions where the parity of A179016 changes, i.e., where the runs of A213729 begin.

0, 1, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14, 16, 18, 22, 23, 25, 27, 30, 31, 33, 34, 35, 38, 39, 40, 42, 44, 47, 48, 50, 51, 52, 56, 58, 59, 65, 67, 69, 70, 72, 74, 77, 78, 80, 81, 82, 86, 88, 89, 95, 97, 98, 99, 101, 102, 108, 111, 114, 119, 121, 122, 123, 124, 126, 128

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8649

FORMULA

a(0)=0 and in the later terms i occurs whenever A213729(i) differs from A213729(i-1).

PROG

(Scheme with Antti Karttunen's intseq-library): (define A218784 (MATCHING-POS 0 0 (lambda (i) (or (< i 1) (not (= (A213729 i) (A213729 (-1+ i))))))))

CROSSREFS

Cf. A213728, A213729, A218545, A218546, A218547. A218544(n)=a(n)+1.

Sequence in context: A353300 A219636 A047428 * A039066 A304800 A197911

Adjacent sequences: A218781 A218782 A218783 * A218785 A218786 A218787

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 10 2012

STATUS

approved