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A363031
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a(n) = sigma(6*n+1). Sum of the divisors of 6*n+1, n >= 0.
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5
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1, 8, 14, 20, 31, 32, 38, 44, 57, 72, 62, 68, 74, 80, 108, 112, 98, 104, 110, 144, 133, 128, 160, 140, 180, 152, 158, 164, 183, 248, 182, 216, 194, 200, 252, 212, 256, 224, 230, 288, 242, 280, 288, 304, 324, 272, 278, 284, 307, 360, 352, 308, 314, 360, 434, 332, 338, 400, 350, 432, 381, 368, 374, 380, 576, 432
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OFFSET
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0,2
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COMMENTS
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The sum of divisors function A000203 seems to behave with a certain periodicity of period 6.
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(Python)
from sympy import divisor_sigma
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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