A103680 Numbers m such that in binary representation m! contains 7!.

7, 8, 100, 113, 117, 123, 136, 145, 155, 156, 163, 165, 168, 179, 186, 203, 245, 247, 248, 259, 265, 275, 283, 289, 293, 294, 296, 305, 307, 309, 311, 318, 328, 330, 341, 342, 343, 346, 352, 355, 360, 375, 384, 386, 399, 402, 405, 408, 410, 413, 415, 419

Offset

1,1

Comments

Complement of A103681: A103675(a(n))=1, A103675(A103681(n))=0.

All the numbers from 5154 to 5*10^5 belong to the sequence. - Giovanni Resta, Apr 07 2013

Links

Table of n, a(n) for n=1..52.

Index entries for sequences related to factorial numbers

Index entries for sequences related to binary expansion of n

Prog

(PARI) is(n)=n=n!; while(n>5039, my(e=valuation(n, 2), e1=valuation((n>>=e)+1, 2)); n>>=e1; if(e>3 && e1==2 && bitand(n, 127)==78, return(1))); 0 \\ Charles R Greathouse IV, Apr 07 2013

Crossrefs

Cf. A102730, A036603, A007088, A000142, A103676, A103678.

Sequence in context: A256340 A192373 A354011 * A219518 A029496 A041109

Adjacent sequences: A103677 A103678 A103679 * A103681 A103682 A103683

Keyword

base,nonn

Author

Reinhard Zumkeller, Feb 12 2005

Status

approved