A054076 Permutation of N: a(n)+C(k,2), where a=A054073 and k=Floor((1+sqrt(8n-3))/2).

1, 2, 3, 6, 4, 5, 9, 7, 10, 8, 15, 13, 11, 14, 12, 20, 18, 16, 21, 19, 17, 26, 24, 22, 27, 25, 23, 28, 33, 31, 36, 29, 34, 32, 30, 35, 41, 39, 44, 37, 42, 40, 45, 38, 43, 50, 55, 48, 53, 46, 51, 49, 54, 47, 52, 60, 65, 58, 63, 56, 61, 66, 59

Offset

1,2

Links

Table of n, a(n) for n=1..63.

Example

Referring to A054073, just add C(k,2) to the numbers in p(k); e.g. p(1)=1->(1); p(2)=(1,2)->(2,3); p(3)=(3,1,2)->(6,4,5).

Crossrefs

Sequence in context: A194867 A194834 A195109 * A194873 A194901 A064470

Adjacent sequences: A054073 A054074 A054075 * A054077 A054078 A054079

Keyword

nonn

Author

Clark Kimberling

Status

approved