A186321 Adjusted joint rank sequence of (f(i)) and (g(j)) with f(i) before g(j) when f(i)=g(j), where f and g are the squares and heptagonal numbers. Complement of A186320.

2, 4, 7, 9, 12, 15, 17, 20, 22, 25, 27, 30, 33, 35, 38, 40, 43, 45, 48, 51, 53, 56, 58, 61, 64, 66, 69, 71, 74, 76, 79, 82, 84, 87, 89, 92, 95, 97, 100, 102, 105, 107, 110, 113, 115, 118, 120, 123, 126, 128, 131, 133, 136, 138, 141, 144, 146, 149, 151, 154, 156, 159, 162, 164, 167, 169, 172, 175, 177, 180, 182, 185, 187, 190, 193, 195, 198, 200

Offset

1,1

Links

Table of n, a(n) for n=1..78.

Example

First, write
1..4...9..16....25...36...49...64.. (squares)
1....7.......18....34........55.... (heptagonal)
Replace each number by its rank, where ties are settled by ranking the square number before the heptagonal:
a=(1,3,5,6,8,10,11,13,...)=A186320
b=(2,4,7,9,12,15,17,20,...)=A186321.

Mathematica

(See A186320.)

Crossrefs

Cf. A186320, A186322, A186323.

Sequence in context: A163293 A188045 A247912 * A026356 A184735 A184583

Adjacent sequences: A186318 A186319 A186320 * A186322 A186323 A186324

Keyword

nonn

Author

Clark Kimberling, Feb 17 2011

Status

approved