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Search: id:A092768
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| 14, 19, 31, 39, 49, 57, 67, 83, 95, 109, 121, 129, 139, 155, 171, 185, 199, 211, 219, 235, 247, 263, 285, 303, 309, 319, 327, 337, 377, 399, 407, 419, 445, 459, 469, 483, 499, 515, 531, 545, 571, 585, 589, 597, 631, 657, 685, 687, 697, 713, 725, 751, 769, 783
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Start with prime numbers, their differences and the absolute values of their differences:
2,.3,.5,.7,.11,.13,.17,.19,.23,.29
..1..2..2..4...2...4...2...4...6
....1..0..2..2...2...2...2...2
and sum the triangles:
a(1)=..2,3,5. = 2+3+5+1+2+1 = 14
........1,2
.........1
a(2)=..3,5,7. = 3+5+7+2+2+0 = 19
........2,2
.........0
etc.
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CROSSREFS
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Sequence in context: A130792 A121235 A007629 this_sequence A144080 A006576 A083247
Adjacent sequences: A092765 A092766 A092767 this_sequence A092769 A092770 A092771
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KEYWORD
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nonn,easy
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AUTHOR
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Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Apr 14 2004
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EXTENSIONS
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More terms from Pab Ter (pabrlos(AT)yahoo.com), May 24 2004
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