A218392 Primitive triangle numbers as defined in A218243.
60, 150, 200, 780, 1530, 1690, 1950, 2040, 2100, 2730, 2860, 3570, 4056, 4200, 4350, 4624, 5100, 5460, 8120, 8250, 8670, 8750, 10812, 11050, 11900, 12180, 13260, 13650, 14060, 14430, 14760, 15540, 17220, 17850, 18564, 19240, 23400, 24420, 26100, 26520, 27880, 29172, 30000
Offset: 1
Keywords
Examples
The term A218243(4)=480 is not in this sequence since 480 = 2^3*60 and 60 = A218243(1). The number n=30000=A218243(67) is divisible by 10^3, but neither of n/2^3, n/5^3, n/10^3 is in A218243, therefore n is in this sequence.
Links
- Charles R Greathouse IV, Table of n, a(n) for n = 1..1000
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