A186331 Adjusted joint rank sequence of (f(i)) and (g(j)) with f(i) after g(j) when f(i)=g(j), where f and g are the pentagonal numbers and the hexagonal numbers. Complement of A186330.
1, 4, 6, 8, 10, 12, 14, 17, 19, 21, 23, 25, 27, 30, 32, 34, 36, 38, 40, 42, 45, 47, 49, 51, 53, 55, 58, 60, 62, 64, 66, 68, 70, 73, 75, 77, 79, 81, 83, 86, 88, 90, 92, 94, 96, 98, 101, 103, 105, 107, 109, 111, 114, 116, 118, 120, 122, 124, 127, 129, 131, 133, 135, 137, 139, 142, 144, 146, 148, 150, 152, 155, 157, 159, 161, 163, 165, 167, 170, 172
Offset: 1
Keywords
Examples
First, write 1..5...12....22.....35...... (pentagonal) 1....6....15....28.......45.. (hexagonal) Then replace each number by its rank, where ties are settled by ranking the pentagonal after the hexagonal: a=(2,3,5,7,9,11,13,15,16,....)=A186330 b=(1,4,6,8,10,12,14,17,19,...)=A186331.
Programs
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Mathematica
(See A186330.)
Comments