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A186390
Adjusted joint rank sequence of (f(i)) and (g(j)) with f(i) after g(j) when f(i)=g(j), where f(i)=6i and g(j)=j(j+1)/2 (triangular number). Complement of A186389.
4
1, 2, 3, 5, 7, 9, 11, 13, 16, 19, 21, 24, 28, 31, 34, 38, 42, 46, 50, 54, 59, 64, 68, 73, 79, 84, 89, 95, 101, 107, 113, 119, 126, 133, 139, 146, 154, 161, 168, 176, 184, 192, 200, 208, 217, 226, 234, 243, 253, 262, 271, 281, 291, 301, 311, 321, 332, 343, 353, 364, 376, 387, 398, 410, 422, 434, 446, 458, 471, 484, 496, 509, 523, 536, 549, 563, 577, 591, 605, 619, 634, 649, 663, 678, 694, 709
OFFSET
1,2
EXAMPLE
First, write
......6.....12..18....24..30. (6i)
1..3..6..10...15...21...28... (triangular)
Then replace each number by its rank, where ties are settled by ranking 6i after the triangular:
a=(4,6,8,10,12,14,15,17,...)=A186389
b=(1,2,3,5,7,9,11,13,16,...)=A186390.
MATHEMATICA
(See A186389.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Feb 19 2011
STATUS
approved