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A092859
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"Difference" of the sequences of triangular numbers (A00217) and the primes (cf. A092858).
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8
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3, 4, 5, 7, 12, 13, 16, 18, 19, 22, 23, 30, 31, 38, 39, 40, 42, 43, 46, 48, 49, 50, 51, 52, 53, 56, 57, 58, 60, 61, 68, 69, 70, 72, 73, 80, 81, 82, 84, 85, 86, 87, 88, 89, 92, 93, 94, 95, 96, 98, 99, 100, 102, 103, 106, 108, 110, 111, 112, 113, 121, 122, 123, 124, 125, 126
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Here the complement of the sequence of primes (1 and the composites) is "added" to the sequence of triangulars, according to the definition outlined in A092858.
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LINKS
| Ferenc Adorjan, Binary mapping of monotonic sequences and the Aronson function
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PROG
| (PARI) {sdif(a, b)= /*Returns the "difference" of monotonic sequences a and b */ return(mtinv(mt(a)+mt(compl(b)))) /* the functions mt(a) and mtinv(r) are defined in A051006 and A092855, respectively */ } {compl(v)=/* Returns the complement of v monotonic positive sequence */ local(n, p=0, vv=[]); n=matsize(v)[2]; for(i=1, n, for(j=p+1, v[i]-1, vv=concat (vv, j)); p=v[i]); return(vv)}
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CROSSREFS
| Cf. A092855, A051006, A092857, A092858, A092860, A092861, A092862, A092863, A092874.
Sequence in context: A113533 A023713 A032890 * A173444 A120424 A139440
Adjacent sequences: A092856 A092857 A092858 * A092860 A092861 A092862
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KEYWORD
| easy,nonn
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AUTHOR
| Ferenc Adorjan (fadorjan(AT)freemail.hu)
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